Linux Certif

Toute la documentation sur la certification Linux LPI

Nagios::StatusLog.3pm

NAME

Nagios::StatusLog, Nagios::(Service|Host|Program)::Status - Perl objects to represent the Nagios status file

DESCRIPTION

Reads the Nagios status log and returns ::Status objects that can be used to get status information about a host. For Nagios version 2.x logs, pass in the Version => 2.0 parameter to new(). And similarly, pass in the Version => 3.0 parameter to new() for Nagios version 3.x logs.

  my $log = Nagios::StatusLog->new(
                 Filename => "/var/cache/nagios/status.dat",
                 Version  => 1.0
            );
  $localhost = $log->host( "localhost" );
  print "status of localhost is now ",$localhost->status(),"\n";
  $log->update();
  print "status of localhost is now ",$localhost->status(),"\n";
 
  # for Nagios v2.0
  my $log = Nagios::StatusLog->new(
                 Filename => "/var/cache/nagios2/status.dat",
                 Version  => 2.0
            );
 
  # for Nagios v3.0
  my $log = Nagios::StatusLog->new(
                 Filename => "/var/cache/nagios3/status.dat",
                 Version  => 3.0
            );
 
 

METHODS

new()

Create a new Nagios::StatusLog instance. The object will be initialized for you (using $self->update()).
 Nagios::StatusLog->new( ``/var/opt/nagios/status.log'' );

update()

Updates the internal data structures from the logfile.
 $log->update();

service()

Returns a Nagios::Service::Status object. Input arguments can be a host_name and description list, or a Nagios::Service object.
 my $svc_stat = $log->service( ``localhost'', ``SSH'' );
 my $svc_stat = $log->service( $localhost_ssh_svc_object );

Nagios::Service::Status has the following accessor methods (For V1):
 host_name
 description
 status 
 current_attempt
 state_type
 last_check next_check
 check_type
 checks_enabled
 accept_passive_service_checks
 event_handler_enabled
 last_state_change
 problem_has_been_acknowledged
 last_hard_state
 time_ok
 current_notification_number  
 time_warning
 time_critical
 process_performance_data
 notifications_enabled
 latency
 scheduled_downtime_depth 
 is_flapping
 plugin_output
 percent_state_change
 execution_time
 time_unknown
 failure_prediction_enabled
 last_notification
 obsess_over_service
 flap_detection_enabled

list_services()

Returns an array of all service descriptions in the status log. Services that may be listed on more than one host are only listed once here.

  my @all_services = $log->list_services;
 
 

list_services_on_host()

Returns an array of services descriptions for a given host.

  my @host_services = $log->list_services_on_host($hostname);
  my @host_services = $log->list_services_on_host($nagios_object);
 
 

host()

Returns a Nagios::Host::Status object. Input can be a simple host_name, a Nagios::Host object, or a Nagios::Service object.
 my $hst_stat = $log->host( 'localhost' );
 my $hst_stat = $log->host( $host_object );
 my $hst_stat = $log->host( $svc_object );

Nagios::Host::Status has the following accessor methods (for V1):
 host_name
 status
 last_check
 last_state_change
 problem_has_been_acknowledged
 time_up
 time_down
 time_unreachable
 last_notification
 current_notification_number
 notifications_enabled
 event_handler_enabled
 checks_enabled
 flap_detection_enabled
 is_flapping
 percent_state_change
 scheduled_downtime_depth
 failure_prediction_enabled
 process_performance_data
 plugin_output

list_hosts()

Returns a simple array of host names (no objects).

  my @hosts = $log->list_hosts;
 
 

info() [Nagios v2 logs only]

Returns a Nagios::Info::Status object. It only has two methods, created() and version().

  my $i = $log->info;
  printf "Logfile created at %s unix epoch time for Nagios verion %s\n",
     $i->created,
     $i->version;
 
 

program()

Returns a Nagios::Program::Status object. No arguments.
 my $prog_st = $log->program;

Nagios::Program::Status has the following accessor methods (For V1):
 program_start
 nagios_pid
 daemon_mode
 last_command_check
 last_log_rotation
 enable_notifications
 execute_service_checks
 accept_passive_service_checks
 enable_event_handlers
 obsess_over_services
 enable_flap_detection
 enable_failure_prediction
 process_performance_data

STRUCTURE

This module contains 4 packages: Nagios::StatusLog, Nagios::Host::Status, Nagios::Service::Status, and Nagios::Program::Status. The latter 3 of them are mostly generated at compile-time in the BEGIN block. The accessor methods are real subroutines, not AUTOLOAD, so making a ton of calls to this module should be fairly quick. Also, update() is set up to only do what it says - updating from a fresh logfile should not invalidate your existing ::Status objects.

AUTHOR

Al Tobey <tobeya@tobert.org>

SEE ALSO

Nagios::Host Nagios::Service